18530537 has 2 divisors, whose sum is σ = 18530538. Its totient is φ = 18530536.

The previous prime is 18530461. The next prime is 18530573. The reversal of 18530537 is 73503581.

Together with next prime (18530573) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16410601 + 2119936 = 4051^2 + 1456^2 .

It is a cyclic number.

It is not a de Polignac number, because 18530537 - 2¹² = 18526441 is a prime.

It is not a weakly prime, because it can be changed into another prime (18530587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9265268 + 9265269.

It is an arithmetic number, because the mean of its divisors is an integer number (9265269).

Almost surely, 2^18530537 is an apocalyptic number.

It is an amenable number.

18530537 is a deficient number, since it is larger than the sum of its proper divisors (1).

18530537 is an equidigital number, since it uses as much as digits as its factorization.

18530537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 18530537 is about 4304.7110239829. The cubic root of 18530537 is about 264.6240640679.

The spelling of 18530537 in words is "eighteen million, five hundred thirty thousand, five hundred thirty-seven".